Alphys

Then the “feast” had its first outbreak alphys had to lock the amalgams in cells for there and her safety but there screams in desperation still haunt her to this day once alphys was taken to a new facility she started to act weird snarling and snapping at the other scientists so she fled back to her old lab.

Once alphys returned to hotland she saw the amalgams out of her cages devouring anything they saw so she went into her lab to find the culprit it turned out to be undyne she ask alphys to leave with her but she refused to scared of what she’ll become once undyne left something happened.

Alphys body started morphing her bright yellow scales turned dark her friendly eyes transformed into deadly glares alphys had no control anymore so she went on the hunt and left her past life behind.

Alphys never goes near her lab due to the painful memories she's too frightened to go find her best friend so she lives in solitude surviving anyway she can.